/*��̬�ı��Ԫ�������С*/
			function recalc() {
				var clientWidth = document.documentElement.clientWidth; //����html�Ŀ�
				if(!clientWidth) return; //��֧��clientWidthָ��ʱ�˳�
				document.documentElement.style.fontSize = 100 * (clientWidth / 1440) + 'px'; //(clientWidth / 640)��html�Ŀ�������ͼ�Ŀ��
			}

			function initRecalc() {
				recalc();
				var resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize';
				if(!document.addEventListener) return; //��֧�ּ����¼�ֱ���˳�
				window.addEventListener(resizeEvt, recalc, false);
				document.addEventListener('DOMContentLoaded', recalc, false);
			}
			initRecalc();